The stratigraphy of the Wianamatta Group Triassic System, Sydney Basin

Abstract

The Wianamatta Group has been divided into two sub-groups—the Liverpool sub-group (lower, approximately 400 feet thick, predominantly shale lithology) and the Camden sub-group (upper, approximately 350 feet thick, sandstone lithology prominent with shale). The Liverpool sub-group includes three formations (Ashfield Shale, Minchinbury Sandstone, Bringelly Shale). The Camden sub-group includes five formations (Potts Hill Sandstone, Annan Shale, Razorback Sandstone, Picton Formation, Prudhoe Shale).